When's the last day you can refuse entering the
February dungeon? (SPOILERZ)

I'm at the end of January, and I realized that the only way to get the last Personamation I'm missing is to skip Marie's dungeon, however, I have Margaret already looking for her. Am I screwed? I think I remember you can say it's too dangerous later on, but I'm not sure.---My video game Youtube channel: http://www.youtube.com/ramblingtoadi7 2600k | GTX 570 | 8 GB DDR3 | 256 GB Crucial M4